CVE-2024-27066
virtio: packed: fix unmap leak for indirect desc table
Description
In the Linux kernel, the following vulnerability has been resolved: virtio: packed: fix unmap leak for indirect desc table When use_dma_api and premapped are true, then the do_unmap is false. Because the do_unmap is false, vring_unmap_extra_packed is not called by detach_buf_packed. if (unlikely(vq->do_unmap)) { curr = id; for (i = 0; i < state->num; i++) { vring_unmap_extra_packed(vq, &vq->packed.desc_extra[curr]); curr = vq->packed.desc_extra[curr].next; } } So the indirect desc table is not unmapped. This causes the unmap leak. So here, we check vq->use_dma_api instead. Synchronously, dma info is updated based on use_dma_api judgment This bug does not occur, because no driver use the premapped with indirect.
INFO
Published Date :
May 1, 2024, 1:15 p.m.
Last Modified :
Sept. 18, 2025, 4:56 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update the affected kernel package.
- Reboot the system.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-27066.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-27066 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-27066
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-27066 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-27066 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Sep. 18, 2025
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-401 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8 up to (excluding) 6.8.2 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.6 up to (excluding) 6.6.23 Added Reference Type CVE: https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100 Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140 Added Reference https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e Added Reference https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd Added Reference https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 01, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: virtio: packed: fix unmap leak for indirect desc table When use_dma_api and premapped are true, then the do_unmap is false. Because the do_unmap is false, vring_unmap_extra_packed is not called by detach_buf_packed. if (unlikely(vq->do_unmap)) { curr = id; for (i = 0; i < state->num; i++) { vring_unmap_extra_packed(vq, &vq->packed.desc_extra[curr]); curr = vq->packed.desc_extra[curr].next; } } So the indirect desc table is not unmapped. This causes the unmap leak. So here, we check vq->use_dma_api instead. Synchronously, dma info is updated based on use_dma_api judgment This bug does not occur, because no driver use the premapped with indirect. Added Reference kernel.org https://git.kernel.org/stable/c/e142169aca5546ae6619c39a575cda8105362100 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/75450ff8c6fe8755bf5b139b238eaf9739cfd64e [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/51bacd9d29bf98c3ebc65e4a0477bb86306b4140 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d5c0ed17fea60cca9bc3bf1278b49ba79242bbcd [No types assigned]